The class mark of a class is $25$ and if the upper limit of that class is $40$ , then its lower limit is _____

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Solution

The correct option is B $10$
Upper limit $= 40$
Class Mark $= 25$
Lower limit $= x$
Now, class mark $= \frac{lower limit + upper limit}{2}$
$25 = \frac{x + 40}{2}$
$50 = x + 40$
$x = 10$

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The class mark of a class is 25 and if the upper limit of that class is 40, then its lower limit is _____

The correct option is B 10Upper limit =40Class Mark =25Lower limit =xNow, class mark =lower limit+upper limit225=x+40250=x+40x=10

The class mark of a class is $25$ and if the upper limit of that class is $40$ , then its lower limit is _____

The correct option is B $10$
Upper limit $= 40$
Class Mark $= 25$
Lower limit $= x$
Now, class mark $= \frac{lower limit + upper limit}{2}$
$25 = \frac{x + 40}{2}$
$50 = x + 40$
$x = 10$